This subject reminds me of my turntable base.
I did a loooong thread detailing my flailing layman attempts to create an isolation base for my 55lb aluminum transrotor turntable. It was fascinating investigating, to the extent I could, the vibration behaviour of various materials, footers etc. I used a seismometer app on my ipad and iphone so that I could at least measure and see, objectively, the relative differences I could detect in damping vibrations. It turned out a spring system under the bass had by far the most dramatic effect in de-coupling the base from any vibrations occurring beneath those springs.
If I stomped on the floor around my turntable rack without the springs/base, I could measure huge, ringing spikes of vibration. But with the spring system under the base, I could stomp around and measure almost nothing.
Anyway, more apropos of the baffle tweak I was thinking of: In constructing my turntable base I used a 2 1/2" thick mapble block, then under it two boards of thick MDF (different thicknesses) with sound damping lining in between as a sort of constrained layer effect. At the last minute I went out and bought some 1/8" thick sheets of stainless steel cut to size. I was amazed at the effect merely placing one of those sheets had underneath the MDF boards. Rapping or knocking on the shelf produced a much more dead "thonk" than just the boards themselves. This was true even when the 2 1/2" maple block was put on top of everything. So it was: Maple block/MDF layer/Steel sheet. With the steel sheet at the bottom of that stack, knocking on the top of the Maple block felt more solid, and sounded more solid, than when the steel sheet way below was removed.
I gained an appreciation for just how darned solid steel is vs wood.
(Which was in the back of my mind, thinking of that baffle tweak).
I did a loooong thread detailing my flailing layman attempts to create an isolation base for my 55lb aluminum transrotor turntable. It was fascinating investigating, to the extent I could, the vibration behaviour of various materials, footers etc. I used a seismometer app on my ipad and iphone so that I could at least measure and see, objectively, the relative differences I could detect in damping vibrations. It turned out a spring system under the bass had by far the most dramatic effect in de-coupling the base from any vibrations occurring beneath those springs.
If I stomped on the floor around my turntable rack without the springs/base, I could measure huge, ringing spikes of vibration. But with the spring system under the base, I could stomp around and measure almost nothing.
Anyway, more apropos of the baffle tweak I was thinking of: In constructing my turntable base I used a 2 1/2" thick mapble block, then under it two boards of thick MDF (different thicknesses) with sound damping lining in between as a sort of constrained layer effect. At the last minute I went out and bought some 1/8" thick sheets of stainless steel cut to size. I was amazed at the effect merely placing one of those sheets had underneath the MDF boards. Rapping or knocking on the shelf produced a much more dead "thonk" than just the boards themselves. This was true even when the 2 1/2" maple block was put on top of everything. So it was: Maple block/MDF layer/Steel sheet. With the steel sheet at the bottom of that stack, knocking on the top of the Maple block felt more solid, and sounded more solid, than when the steel sheet way below was removed.
I gained an appreciation for just how darned solid steel is vs wood.
(Which was in the back of my mind, thinking of that baffle tweak).